Resolved dual boot in boot manager menu

i was installing win 7 on a Adata SX900 solid state drive as it was installing my electricity went off. when it finally came back on i tried resume the install but all would come up was boot manager missing. I'm assuming this is because of the installation interupt. So i got windows installed on a 2TB drive and intalled the OS on the SSD from windows explorer. however i now have a dual boot everytime i switch on and its really bugging me. So can you guys explain kindly how to get rid of the second win 7 option as there is nothing on it at all

Please